def dayUP(df):
    dayup=1
    for i in range(365):
        if i % 7 in [6,0]:
            dayup=dayup*(1-0.01)
        else:
            dayup=dayup*(1+df)
    return dayup
dayfactor=0.01
while dayUP(dayfactor)<37.78:
    dayfactor+=0.01
print("工作日的努力参数是：{:.3f}".format(dayfactor))